Testomat 2000 CLF

Summary

Product identification

The Testomat 2000® CL T and Testomat 2000® CL F are process photometers for monitoring total chlorine (CL T) and free chlorine (CL F).

Intended Use

These are wet-chemical online monitors designed for measuring the concentration of total and free chlorine. The measuring range for both is 0 – 2.5 ppm (or mg/l). The intended applications include monitoring disinfectant dosing in the drinking water sector. The feed water must be clear, colorless, and free of undissolved particles.

Performance Specifications

• Measurement Principle: Photometric analysis using the DPD method (according to EN ISO 7393-2).
• Reagent Consumption: Analysis involves adding three reagents, with a reaction time of approximately 1 minute (excluding flush time).
• Features:
  • Menu-driven operation with a plain text display.
  • Freely selectable units (ppm or mg/l).
  • Precise piston-dosing pump for accuracy.
  • Analysis initiation modes:
    • Automatic interval operation (interval pause adjustable from 0 to 99 minutes).
    • External control.
    • Volume controlled (via water meter).
  • Two independent limit values with hysteresis (1, 2, or 3 bad analyses) and adjustable switch functions.
  • Monitoring of two measuring points (via external solenoid valves).
  • Internal error documentation.
  • Programmable service address and maintenance interval.
  • 500 ml reagent storage bottle.
  • Optional interfaces: 0/4-20 mA, 0/2-10 V, or RS 232 for a log printer.

Operating Limits

• Water Pressure: 0.3 to 8 bar. Operation in the 0.3 to 1 bar range requires modification of the flow controller.
• Water Temperature: 10 °C to 40 °C. For temperatures above 40 °C, a KCN type cooler is recommended.

Feed Water Requirements

• Must be clear, colorless, and free of undissolved particles.
• If the measuring water contains more than 20 mg/l CO₂ (carbonic acid), incorrect evaluations cannot be excluded.
• Other oxidizing agents like ozone, chlorine dioxide, or hydrogen peroxide will be measured and increase the chlorine reading.

Installation

• Install in a location protected from splash water, dust, and aggressive substances.
• Mount vertically, without mechanical stress, and on a vibration-free site.
• Water inlet hose should be kept as short as possible (max. 5 m).
• Ensure sufficient space for opening the instrument door.
• Water inlet pressure must be between 0.3 bar and 8 bar, with avoidance of strong pressure fluctuations.
• Inlet connection should be laid vertically upwards from the main water line.
• An opaque plastic hose (6/4 x 1) is used for water inlet.
• Water outlet should be connected via an opaque hose (internal diameter 14 mm) and laid without backwater or siphoning.

Electrical

• Mains voltage connection: 24 V / 115 V / 230 V AC.
• Requires an interference-free and stable power supply.
• Connecting cables should be kept short and installed separately from power cables.
• Connect to the protective earth conductor (for 230/115 VAC).
• Maximum electrical load capacity of relay outputs should not be exceeded (max. 240 VAC, 4 A per relay).

Mechanical / Hydraulic

• Water Inlet Connection: Standard plug connector for plastic hoses 6/4 x 1.
• Water Outlet Connection: Connection for opaque outlet hose (internal diameter 14 mm).
• Reagent Bottle: 500 ml capacity.

Commissioning

• Requires careful handling of reagents, adhering to safety data sheets.
• Ensure correct setup of the reagent intake hose.
• Water inlet should be opened slowly to prevent overflow; filling the measuring chamber should take 2 to 6 seconds.

Operation and Settings

• Operation: Menu-driven via a plain text display and function keys.
• Switching On/Off: Uses the main switch. An internal instrument fuse protects against overloads.
• Display: Shows operating status, measured values, limit values, and error/maintenance messages.
• Password Protection: A four-digit password (current time in reverse order) is required for basic program settings.
• Modes of Operation: Time control, quantity control (water meter), dynamic analysis start, and external analysis start.
• Analysis Interval: Determined by programmed interval pause, flush times, and analysis duration.
• Parameter Selection: Can be set for either total chlorine or free chlorine. Changing from total to free requires disconnecting and plugging reagent C.
• Flushing: Internal and external flushing times can be programmed.
• Limit Value Monitoring: Two programmable limit values (LV1, LV2) with adjustable hysteresis.
• Hysteresis: Can be set to 1, 2, or 3 bad analyses to improve reliability.
• Switch Functions: Various switch functions (0-5) can be programmed for the limit value outputs.
• Inputs: Start, Stop, IN1 (Universal input 1), IN2 (Water meter).
• Outputs: Flush, LV1, LV2, Measuring point switch-over, AUX (Universal output), Alarm, Maintenance.
• Interfaces: Optional 0/4-20 mA or 0/2-10 V output, or RS232 serial interface.

Maintenance

• Regular visual inspection of reagent expiry, hose connections, water connections, and instrument cleanliness is recommended.
• Trouble-free operation requires regular maintenance as described in the "Maintenance" section and the "Maintenance manual of Testomat 2000®/Testomat ECO®".

Troubleshooting

• Refer to the "Error messages/Troubleshooting" section for issues.

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror